한국토양비료학회지 (Korean Journal of Soil Science and Fertilizer)
- 제21권3호
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- Pages.264-271
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- 1988
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- 0367-6315(pISSN)
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- 2288-2162(eISSN)
논토양(土壤)의 이화학적(理化學的) 성질(性質)에 미치는 유기물(有機物)의 연용효과(連用效果) -I. 유기물연용(有機物連用) 답(畓)의 토양화학적(土壤化學性) 변화연구(變化硏究)
Effect of long-term organic matter application on physico-chemical properties in paddy soil -I. Changes of the soil-chemical properties of paddy field by long-term application of organic matter
- Yoo, Chul-Hyun (Honam Crop Exp. Station, RDA) ;
- Kim, Jong-Gu (Honam Crop Exp. Station, RDA) ;
- Park, Keon-Ho (Honam Crop Exp. Station, RDA) ;
- Kim, Seong-Jo (College of Agriculture, Wonkang University)
- 발행 : 1988.09.30
초록
유기물연용(有機物連用) 답토양(沓土攘)의 화학적(化學的) 특성(特性) 및 유기물연용시(有機物連用時) 질소시비량(窒素施肥量) 수준(水準) 구명(究明)코져 하해혼성평탄지(河海混成平坦地) 토양(土壤)인 전북통(全北統)에서 유기물(有機物)(무시용(無施用), 생약(生藥)500, 퇴비(堆肥) 1,000 kg/10a) 처리(處理)하고, 질소수준(窒素水準)(0, 15, 20kg/10a)을 달리하여 1979~1987년(年)까지 9년(年)동안 시험(試驗)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 토양(土壤)의 pH는 유기물(有機物) 무시용구(無施用區)에서 9년간(年間) 큰 변화(變化)가 없었으나 퇴비구(堆肥區) 는 3~4년차(年次), 생고구(生藁區)는 5~6년차(年次)에서 가장 낮았다. 2. 토양중(土攘中) 유기물함량(有機物含量)은 유기물연용(有機物連用)이 경과(經過)할수록 증가(增加)하였으나 연용(連用) 5년차(年次) 이후(以後)부터 생고연용구(生藁連用區)의 유기물함량(有機物含量)이 퇴비구(堆肥區)보다 높았다. 3 유효규산(有效珪酸) 및 인산함량(燐酸含量)은 유기물(有機物)을 연용(連用)하므로서 표(表) 심토(心土) 공(共)히 급격(急激)히 증가(增加)하였으며, 퇴비구(堆肥區)보다 생고연용구(生藁連用區)에서 증가(增加) 폭(幅)이 컸고 무시용구(無施用區)에서는 감소(減少)되는 경향(傾向)이었다. 4. 토양중(土攘中) 치환성(置換性) 양(陽)이온 (Ca, Mg, K) 및 전질소함량(全窒素含量) 유기물연용구(有機物連用區)에서 증가(增加)되었으며, 특(特)히 생고연용구(生藁連用區)에서 높았고 무시용구(無施用區)에서는 감소(減少)되는 경향(傾向)이었다. 5 토양(土壤)Eh는 무시용(無施用)>퇴비(堆肥)>생고구(生藁區) 순(順)으로 낮은 값을 나타내고 있으나, 유기물연용(有機物連用)으로 유수형성기(幼穗形成期)에서 출수기(出穗期)까지 급격(急激)히 환원(還元)되어 Eh값이 증가되었다. 6. 수량구성요소중(收量構成要素中)
This experiment was carried out to investigate the effects of long-term applications of organic matters on the chemical properties and on the application levels of nitrogen in Fluvio-Alluvial plain of Jeonbug series. The amounts of application of rice straw and compost, the sources of organic matters, were 500 and 1,000 kg/10a in combined with the different nitrogen levels of 0.15 and 20 kg/10a, respectively. The results obtained from the 9 year's experiment during 1979 to 1987 were summarized as follows: I. In long-term application of Organic matter the soil pH showed the lowest value in the 3rd-4th year at rice straw and 5th-6th year at compost but it varied less in control plot for 9 years. 2. Organic matter content in the soils was gradually increased by yearly application of organic matter, while it was higher in rice straw than in compost since the 5th year. 3. The contents of available silica and available phosphate in soil were rapidly increased by long-term application of organic matter and it was especially higher in rice straw than compost, but it was gradually decreased in control plot. 4. The contents of exchangable cations (Ca, Mg and K) and the total nitrogen were increased by long-term application of organic matter they were in rice straw than in compost. But they showed decreasing tendency in control plot. 5. The soil Eh was lower in order of rice straw, compost and control plot however application of orgnic matter resulted in increasing soil Eh due to the rapid reduction of soil from panicle formation to heading stage in rice cultivation. 6. The number of panicles per
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